至此，在上文创建的回调路由里就包含了*回调路径操作*（外部开发者要在外部 API 中实现）。

现在使用 API *路径操作装饰器*的参数 `callbacks`，从回调路由传递属性 `.routes`（实际上只是路由/路径操作的**列表**）：

```Python hl_lines="36"
{!../../../docs_src/openapi_callbacks/tutorial001.py!}
```

!!! tip "提示"

    注意，不能把路由本身（`invoices_callback_router`）传递给 `callback=`，要传递 `invoices_callback_router.routes` 中的 `.routes` 属性。

### 查看文档

Como dito na seção [Alternativas](alternatives.md){.internal-link target=_blank}:

<blockquote markdown="1">

**FastAPI** não existiria se não pelo trabalho anterior de outros.

Há muitas ferramentas criadas antes que ajudaram a inspirar sua criação.

    assertThat(response.body.string()).isEqualTo("abc")
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

    // Note that although we have two routes available, we only use one. The retry is permitted
    // because there are routes available, but it chooses the existing connection since it isn't
    // yet considered unhealthy.
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(1)
  }

### Oparcie o standardy open

* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> do tworzenia API, w tym deklaracji <abbr title="znane również jako: paths, endpoints, routes">ścieżek</abbr> <abbr title="znane również jako metody HTTP, takie jak POST, GET, PUT, DELETE">operacji</abbr>, parametrów, <abbr title="po angielsku: body requests">ciał zapytań</abbr>, bezpieczeństwa, itp.

=== "Python 3.8 and above"

    ```Python hl_lines="1  14-15  18-20  33"
    {!> ../../../docs_src/extra_models/tutorial003.py!}
    ```

For example, it was clear that ideally it should be based on standard Python type hints.

Also, the best approach was to use already existing standards.

So, before even starting to code **FastAPI**, I spent several months studying the specs for OpenAPI, JSON Schema, OAuth2, etc. Understanding their relationship, overlap, and differences.

## Design

Porque las *operaciones de path* son evaluadas en orden, tienes que asegurarte de que el path para `/users/me` sea declarado antes que el path para `/users/{user_id}`:

```Python hl_lines="6  11"
{!../../../docs_src/path_params/tutorial003.py!}
```

J'ai évité la création d'un nouveau framework pendant plusieurs années. J'ai d'abord essayé de combler toutes les
fonctionnalités couvertes par **FastAPI** en utilisant de nombreux frameworks, plug-ins et outils différents.

Mais à un moment donné il n'y avait pas d'autre option que de créer quelque chose qui offrait toutes ces
fonctionnalités, en reprenant et en combinant de la meilleure façon possible les meilleures idées des outils

    if (requestSendStarted && requestIsOneShot(e, userRequest)) return false

    // This exception is fatal.
    if (!isRecoverable(e, requestSendStarted)) return false

    // No more routes to attempt.
    if (!call.retryAfterFailure()) return false

    // For failure recovery, use the same route selector with a new connection.
    return true
  }

  private fun requestIsOneShot(

  // selected by this will be the ones affected by this deployment.
  // +optional
  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 2;

  // Template describes the pods that will be created.
  optional k8s.io.api.core.v1.PodTemplateSpec template = 3;

  // The deployment strategy to use to replace existing pods with new ones.
  // +optional
  // +patchStrategy=retainKeys